'Saint Dymphna was the daughter of a pagan Irish

Ireland

Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 king and his Christian

Christian

A Christian is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth as recorded in the Canonical gospels and the letters of the New Testament...

 wife in the 7th century. She was murdered by her father. The story of St. Dymphna was first recorded in the thirteenth century by a canon of the Church of St. Aubert at Cambrai, commissioned by the Bishop of Cambrai, Guy I (1238–1247). The author expressly states that his writings were based upon a longstanding oral tradition and a persuasive history of inexplicable and miraculous healings of the mentally ill.
Dymphna was born in Ireland during the 7th century.